Abstract
The effect of crack shape, size and its distribution on
the stress magnification of Aluminum alloy AA2024-T3 tensile test
specimen was studied using Finite Element Analysis (FEA)
approach. A defect free neat reference sample of the alloy was
developed as per ASTM-E8 standard using ANSYS Multiphysics.
Circular and rectangular cracks of 0.1 inch to 0.3 inch diameter
for circular cracks and 0.1 inch to 0.3 inch wide rectangle having
same area as their circular counterparts were incorporated in the
reference sample to study influence of crack morphology on stress
magnification, while three 0.1 inch circular cracks were
distributed diagonally on the reference specimen to study the
influence of crack distribution, with separate simulations for each
specimen. Each specimen was subjected to a fixed support and a
tensile load on opposite end was applied to stress the material to
Ultimate tensile strength. 24%, 13% and 26% increase in stress
magnification was observed for 0.1 inch, 0.2inch and 0.3-inch
rectangular cracks of same area as their circular crack
counterparts while 21% reduction in stress magnification was
observed by distributing same number of cracks from
concentrated to diagonal distribution.
Zaigham Saeed Toor. (2020) Influence of Crack Morphology and its distribution on Stress magnification of AA2024-T3, Journal of Space Technology , Volume 10, Issue 1.
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